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Fans for the Nuclear Industry

Fläkt Solyvent Ventec has a solid and worldwide experience in fans manufacturing in the nuclear industry. Indeed, we master all techniques and requirements of fans in nuclear power plants.

There are over 15000 Fläkt Solyvent-Ventec fans operating in 30 nuclear plants worldwide.
Moreover we secure 75 reactors and waste treatment factories.


Handling of the manufacturing and development process matching your highest requirements:

TECHNICAL VALIDATION

  • Mechanical, acoustic and aerodynamic calculations
  • Seism calculation (Computational Aided Design for finite elements analysis and search for natural frequency)
  • Tests on vibrating table

LEVELS OF SEALING

They are related to the environment stresses and made using various technologies (neutral gaz injection at the shaft, confined motor, enclosed motor)

INSPECTION OF WELDINGS

  • Penetrant inspection at 20% and / or 100%
  • X ray control of welding

COATINGS

Standard, decontaminating, acid proof

CONTROLS AND CERTIFICATES

  • Welding operating process, qualified operator
  • Control of tightness
  • Material Certificates (document of compliance, acceptance certificate)
  • List of operations of manufacturing and control
  • Vibration, acoustic and aerodynamics tests


Location of our fans in a nuclear power plant

NUCLEAR PROCESS

Extracting fan for security

Standard conditions :

  • Operates under 1 bar of absolute pressure

Specific designs and tests :

  • Casing in cast iron and gastight
  • Gastight electrical connections
  • X rays tests of the welds and checking by ultra sound

Emergency conditions :

  • Possibility to operate under 1,5 bar of absolute pressure
  • Mixture of air and sodium – boric acid – hydrogen – radiation contamination
  • Explosion resistant buiding

VENTILATION OF BATTERY ROOMS

Extracting fans for battery rooms (ATEX)

Battery rooms ventilation to secure installations which are sensitive to explosions (flammable vapors + electric equipments):

  • Building complying to the ATEX 94/9/CE directive and EN NF14986 standard
  • Specific coatings, acid proof

BUILDING VENTILATION ANNEXES


Vacuum fans for nuclear premises

  • Dual ot three gang network for aerodynamic circuit
  • Decontaminating coating according to the circuit
  • Tightness according to the circuit
  • Controlled weldings

MACHINE ROOM

Fans for building and ventilation vacuum

If an accident occurs, the machinery room must be under pressure
in order to avoid environmental pollution

OTHER USE

Cooling towers for oil cooler and building ventilation

  • Oil cooling for transformers and lubrificating